#1 best-selling iPad app in US, Japan, UK, Germany, and 17 other countries!

Duet turns your iPad or iPhone into the most advanced extra display for your Mac & PC. Developed by a team of ex-Apple engineers, Duet offers unparalleled performance and display quality - all with zero lag.

Be twice as productive by multitasking with two screens. And for those that travel, have a portable way to stay productive.

To get started, plug your iPad into your desktop using your charging cable. The free Duet desktop app will automatically detect your device, and transform it into a high performance touchscreen display.

There’s no need to worry about unreliable Wi-Fi, laggy performance, pixelated screens or managing network passwords.

Interact with Mac & PC like never before, with touch & gestures, including two-finger scrolling, pan and zoom.

And with our latest release, you can even add a touch bar to any iPad with any Mac.

With Duet Pro, you can turn your iPad and Apple Pencil into a professional graphics tablet. We’ve re-engineered our rendering algorithms for ultra-responsive drawing, optimized specifically for designers, illustrators and artists.

Duet Pro also unlocks pressure & tilt sensitivity, hover, palm rejection, and more to seamlessly draw in the most powerful programs for professionals. Get precise control in Photoshop, Corel Painter, Lightroom, ToonBoom, Illustrator, Manga Studio and more. 

TechCrunch - "Feels Like Magic"
TIME - "Getting Work Done Faster and More Efficiently"
The Guardian - "Lag-free"
Forbes - "The simple thing to note is this...Duet Display works."
The Verge - "Glorious Fluidity"
Lifehacker - "It's fast, easy to use, and works great"
Business Insider - "Zero lag and true retina resolution”
Wall Street Journal - “It’s as easy as just plugging it in"

“Awesome! My iPad Pro can be an extra monitor! Cool app”
~CEO of T-Mobile, John Legere

“Very smooth and responsive indeed, plus you could use the touch screen to “click” on screen interfaces!”
~Photographer, Lok Cheung

“Love the ability to use my iPad as a monitor with Duet.”
~Former Chief Evangelist of Apple, Guy Kawasaki

“Just started using this app called Duet… Kinda love it so far.”
~Comedian and Youtube, Phillip DeFranco

“All my mac folks look at the Duet app… GREAT!”
~Actor and Comedian, Sinbad 

"I really like the app, I suppose the biggest compliment I can give is that it's so easy to setup it almost seems like an Apple product.”
~Early Adopter, M. Nightingale

"Amazing solution for me by the way. Works as I was hoping for and actually my main reason for getting an iPad : )”
~Early Adopter, M. Gemzoe

Duet Works With:
All iPhones and iPads with iOS 7.0 and later
All Macs with 10.9 (Mavericks) and later
All PCs with Windows 7 and later

Duet Pro Works With:
All iPad Pros with Apple Pencil
All Macs with 10.9 (Mavericks) and later
All PCs with Windows 8.1 and later (64 bit)

Duet Pro is an optional upgrade for additional features, and price may vary by location. Duet Pro subscriptions will be charged to your credit card through your iTunes account. Your subscription will automatically renew unless canceled at least 24 hours before the end of the current period. You will not be able to cancel the subscription once activated. Manage Duet Pro in Account Settings after the optional upgrade.

Learn more at
Privacy Policy:

What’s New

Version 2.1.8

New Hardware Acceleration for Mac (requires Mojave 10.14.2)
Adaptive line lead for Pro users - line lead now matches the color and shape of your stroke
New iPad Pro support
Fix for mirroring
Stability fixes
Please download the latest desktop apps from our website for the best experience
Mac v2.0.7.2 -
Windows v1.6.1.5 -

Ratings and Reviews

4.1 out of 5
396 Ratings

396 Ratings

shv90 ,

Latest update makes it flawless

After a long wait and a number of updates and failed launches, Duet now finally works with 0 errors and issues. It’s what I always wanted, as an efficient 3rd display with my MBP and I satisfies everything one would want as a small but a handy external display.

woodelfrik ,


If you’re considering using this as a sort of Wacom Cintiq for your Mac/ Windows: don’t! The lag is truly horrible even in the most lightweight of sketching applications like Rebelle 3 and Autodesk Sketchbook. It’s so bad it’s completely unusable.

BUT THE WORST part is that when you first launch the app, it’ll offer you a 1 week Pro trial that’s supposed to optimize the experience for digital art (ha!). I chose that one, thinking I could always cancel in the next 1 week ifI decided not to keep it. Got an email minutes later saying that my purchase for the Pro version was successful. Went to the App store and checked my subscriptions, and sure enough, it charged my card on the very same day. Said it would renew exactly a year from the day I first installed the app. This is clear deception; every other app that offers a trial period does NOT charge you before the trial period expires. Needless to say, that’s Rs.3,000 gone down the drain.

Oh and did I mention that the resolution on the mirrored display is absolutely terrible? Defeats the whole purpose, really. If this is what the ‘pro’ version is, I shudder to think what the Air and the Free versions are like. Also the iPad got REALLY hot during use- I don’t think it’s ever run that warm before.

Bottom line: It’s an absolute waste of money, just wait for iPadOS and Sidecar on your Mac and use that. Or just hook up a Wacom to your computer. Just stay away from Duet.

subhra swarup ,


Finally today duet display satisfied my purchase of ipad. I wanted an ipad as well as a secondary display. But i was upset as i was not able to extend my pc screen. Finally duet display did it. Its a million dollars application. Kudos to the developer.


Duet, Inc.
55.8 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad and iPod touch.


English, Danish, Dutch, Finnish, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese

Age Rating
Rated 4+
© Duet, Inc.
₹ 799
In-App Purchases
  1. Duet Pro ₹ 2,449
  2. Duet Air (Annual) ₹ 1,549
  3. Duet Pro ₹ 299


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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